diff --git a/hgext/convert/__init__.py b/hgext/convert/__init__.py
--- a/hgext/convert/__init__.py
+++ b/hgext/convert/__init__.py
@@ -53,11 +53,14 @@ class converter(object):
         self.authorfile = None
         self.mapfile = filemapper
 
+        self.maporder = []
         self.map = {}
         try:
             origrevmapfile = open(self.revmapfile, 'r')
             for l in origrevmapfile:
                 sv, dv = l[:-1].split()
+                if sv not in self.map:
+                    self.maporder.append(sv)
                 self.map[sv] = dv
             origrevmapfile.close()
         except IOError:
@@ -238,7 +241,7 @@ class converter(object):
         try:
             self.source.before()
             self.dest.before()
-            self.source.setrevmap(self.map)
+            self.source.setrevmap(self.map, self.maporder)
             self.ui.status("scanning source...\n")
             heads = self.source.getheads()
             parents = self.walktree(heads)
diff --git a/hgext/convert/common.py b/hgext/convert/common.py
--- a/hgext/convert/common.py
+++ b/hgext/convert/common.py
@@ -44,8 +44,11 @@ class converter_source(object):
     def after(self):
         pass
 
-    def setrevmap(self, revmap):
-        """set the map of already-converted revisions"""
+    def setrevmap(self, revmap, order):
+        """set the map of already-converted revisions
+        
+        order is a list with the keys from revmap in the order they
+        appear in the revision map file."""
         pass
 
     def getheads(self):
diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -147,7 +147,7 @@ class convert_svn(converter_source):
 
         self.head = self.revid(self.last_changed)
 
-    def setrevmap(self, revmap):
+    def setrevmap(self, revmap, order):
         lastrevs = {}
         for revid in revmap.keys():
             uuid, module, revnum = self.revsplit(revid)